Question #e0b23

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Answer 1 · 2015-05-14T11:47:13

That many molecules will have a mass of 88.02 g.

$N$ is just a notation used for Avogadro's number, which represents the number of molecules present in 1 mole of a substance. In your case,

$N = 6.022 * 10^(23)"molecules"$ $CO_2$

Since you have to calculate the mass of 2N molecules, which is equivalent to having 2 moles of $CO_2$ , you'll get

$2cancel("moles"CO_2) * "44.01 g"/(1cancel("mole"CO_2)) = "88.02 g"$

which is equivalent to

$2cancel("N molecules"CO_2) * "44.01 g"/(cancel(N" molecules"CO_2)) = "88.02 g"$